<TABLE> <S> <C>
<ARTICLE> 5
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 14,416
<SECURITIES> 0
<RECEIVABLES> 117,788
<ALLOWANCES> 4,831
<INVENTORY> 93,370
<CURRENT-ASSETS> 279,219
<PP&E> 1,351,427
<DEPRECIATION> 695,595
<TOTAL-ASSETS> 2,228,826
<CURRENT-LIABILITIES> 195,559
<BONDS> 1,050,245
0
0
<COMMON> 52,928
<OTHER-SE> 625,597
<TOTAL-LIABILITY-AND-EQUITY> 2,228,826
<SALES> 572,707
<TOTAL-REVENUES> 572,707
<CGS> 452,062
<TOTAL-COSTS> 452,062
<OTHER-EXPENSES> 21,873
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 44,402
<INCOME-PRETAX> 76,894
<INCOME-TAX> 23,990
<INCOME-CONTINUING> 52,904
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 52,904
<EPS-BASIC> 1.93
<EPS-DILUTED> 1.90
</TABLE>